Fix Mgmt UI local shovel delete-after

There was no input field to set the number for src-delete-after
parameter.

The help text was also missing for local shovel auto-delete.

Author: gomoripeti

deps/rabbitmq_shovel_management/priv/www/js/shovel.js

@@ -159,6 +159,16 @@ HELP['shovel-amqp10-auto-delete'] =
        <dd>The shovel will delete itself after the given number of messages have been transferred.</dd>\
 </dl>';
 
+HELP['shovel-local-auto-delete'] =
+    '<dl>\
+       <dt><code>Never</code></dt>\
+       <dd>The shovel never deletes itself; it will persist until it is explicitly removed.</dd>\
+       <dt><code>After initial length transferred</code></dt>\
+       <dd>The shovel will check the length of the queue when it starts up. It will transfer that many messages, and then delete itself.</dd>\
+       <dt><code>After num messages</code></dt>\
+       <dd>The shovel will delete itself after the given number of messages have been transferred.</dd>\
+</dl>';
+
 HELP['shovel-remaining-counter'] =
     'When not <code>unlimited</code>: number of messages left to transfer before this shovel will be deleted.';
 

deps/rabbitmq_shovel_management/priv/www/js/tmpl/dynamic-shovels.ejs

@@ -247,12 +247,17 @@
                     </label>
                   </td>
                   <td>
-                    <select name="local-src-delete-after">
+                    <select name="local-src-delete-after-selector" class="controls-appearance">
                       <option value="never">Never</option>
                       <option value="queue-length">After initial length transferred</option>
-                      <option value="number">After num messages</option>
+                      <option value="local-number">After num messages</option>
                     </select>
                   </td>
+		  <td>
+                    <div id="local-number-div" style="display: none;">
+                      <input type="text" name="local-src-delete-after"/>
+                    </div>
+                  </td>
                 </tr>
                </table>
             </div>